race formation

基本解释

The insects are more likely to switch to plants with similar plant chemicals to their native host plants, in the forms of host shift, host expansion and host race formation.
有关食性分化方向的观点倾向于寄主植物转向化学物质相似的植物，表现为寄主转移、寄主扩张和形成寄主型等；
www.insect.org.cn
Experience half several century, now tradition of with foreignly combine already compare moderate, permeate fusion mutually, gradual formation new of race vocal music system.
经历了半个多世纪，如今传统的与外来的结合已较协调，相互渗透融合，逐渐形成新的民族声乐体系。
blog.sina.com.cn
The conventional forms of containment action against the rising hegemonic power, like the arms race and the formation of military alliance, do not appear noticeably in the post-Cold War era.
冷战后制衡美国的传统均势行动，如军备竞赛与大国同盟并没有明显出现，这是因为均势的生成机制与表现方式发生变化。